Crank-sector safety-escapement for adding-machines.



- W. W. LASKER.

CBAfN-K SECIOR SAFETY ESCAPEMENT FOR ADDING MACHINES.

APPLICATION FILED APR. 7. |916.

Patented Nov. 19, 1918.

2 SHEETS-SHEET I.

W. W. LASKER.

CRANK SECTOR SAFETY ESCAPEMENT FOR ADDING MACHINES.

APPLICATKON FILED APR.7, 1916.

Patented Nov. 19, 1918.

2 SHEETS-SHEET 2.

NITED STATES PATENT OFFICE.

WILLIAM W. LASKERyOE BROOKLYN, NEW YORK, ASSIGNOR TO POWERS ACCOUNTINGMACHINE COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF DELAWARE.

CIR'AN'K-SECTORv SAFETY-ESCAPEMENT FOR ADDING-MACHINES.

medication of Letters Patent.

Patented Nov. 19, A19.18.

Application led April 7, 1916. Serial No. 89,534.

To all whom t may concern.'

' Be `1t known that I, WILLIAM W. LAsknR, a citizen of 'the UnitedStates, residing 1n Brooklyn, in the county of Kings and State i thetype-carryin segments when totals are to he printed, t e type-carryingsegments having a .series of teeth for coperatmg with teeth formed on`the accumulator wheels.

In the operation of machines of this type,

the type-carrying segments are oscillating members and the accumulatorwheels are only actuated into mesh with the type-carrying segments whentotals are to be printed or when the individual'items are to beaccumulated 0n said accumulator wheels and` during thel remainingmovement of the type carrymg segments the accumulator wheels aredisengaged from the segments.

When the accumulator wheels are actuated into mesh with thetype-carrying segments and the crests of the teeth of the accumulatorwheels should strike the crests of the teeth of the type-carryingsegments, great strains will be exercised on the several parts of themachine, resulting in the actual destruction of certain of the parts,and not infrequently shearing off the teeth of the type-carryingsegments and accum lator wheels.

Among the main objects of the present invention, it is aimed to providea construction whereby the several parts of the machine will beprotected from injury when such faulty engagement takes lace.

Other Objects of the inventlon are simplicity of construction andminimum of parts.

These and other features, capabilities and advantages of the inventionwill appear from the subjoined detail description of one specificembodiment'thereof, illustrated in the accompanying drawings, in which--Figure 1 illustrates parts of the printing mechanism equipped with thepresent improvement in which the accumulator wheels are shown free fromthe type-carrying segments.

Fig. 2 is a fragmental view showing the accumulator wheels andtype-carrying segments in faulty engagement with one another while theprotecting means receive the strains.

Fig. 3 is a fragmental view showing the accumulator wheels andtype-carrying segments in another position of faulty engagement.

Fig. 4L is an end elevational' view of the crank sector equipped for thepresent arrangement.

Fig. 5 is an end elevational view of another portion of the protectingmeans.

In the embodiment shown, there is provided a printing mechanism of thetype illustrated in the co-pending application, Serial No. 802,363,filed November 22, 1913, for improvements in` tabulator printers, led inthe name of James Powers, having a number of type-carrying segments 11provided with teeth 12 on their lower-edge for engagement with the teeth13 of the accumulator wheels 14 mounted on the shaft 15 which isslidably guided in the cam slot 16 of the cam levers 17 which arepivotally connected at their lower ends` to the shaft 18. The cam levers17 are pivotally connected to the'slide-bar 19 which has an upperactuating notch (not shown) and a lower actuating notch 21. Theactuating notches of the slide-bar 19 are adapted to be engaged by theupper and lower actuating pins secured to the actuating lever 22 whichis mounted on the shaft 23 on which is actuatably mounted the lever 24having a pin 25 at its lower end for engagement with the crank sector 26which is pivotally mounted on the main actuating shaft 27. To the cranksector 26 is pivotally connected the link 28, which in turn is pivotallyconnected t0 the retractor 29 for releasing and retracting thetype-carrying segments 11.

lll/'hen the link 19 is drawn into its lower position, it is set fortaking totals, which is done by actuating the total-taking shaft 30 onwhich is fixed the arm 31 for engaging the upwardly extending arm 32 ofthe bell crank 33 which is loosely mounted on the shaft 30 and has aforwardly extending arm 34 which is pivotally connected to the slidebar19 by the link 35. For normally maintaining` the slide-bar 19 in raisedposition, and therewith the arm 34 in raised position so that the arm 32rests against the arm 31, the spring 36 is provided.

The operation of the foregoing is substantially as follows z-Whenindividual items are to be printed, the slide-bar 19 being maintained inraised position, the crank sector 26, on its initial forward movement,strikes the pin 25 and carries it forwardly therewith whereby the upperactuating pin on the actuating lever 22 will engage the upper actuatingnotch of the slide-bar 19 and thrust the slide-bar 19 and the slottedcam lever 17 rearward thereby drawing the accumulator wheels 14 out ofengagement with the ty e-carryin segments 11. Simultaneously t erewith te retractor 29, being released bythe action of the link 28, the`type-carrying segments will travel forward and set type accordin to thesetting of pins not here illustrated. gIhen, upon the return of thesector 26, the pin 25 being again engaged by the sector, the upper pinof the actuating lever 22 being still in engagement with the upperactuating notch of the slidebar 19, the slide-bar 19 will again be movedforward thereby moving the accumulator wheels 14 into engagement withthe typecarrying segments 11 and thus, upon the return movement of thetype-carrying segments 11, the sum printed by the type of such segments,said sum corresponding with the number of segment-teeth that are inadvance of the accumulator wheels 14, `will be accumulated on theaccumulator wheels 14. When a total is to be taken, the shaft 30 will beactuated thereby drawing down the slidebar 19, through the action of thespring 36, so that the lower actuating pin of the actuating lever 22will engage the actuating notch 21 of the slide-bar 19 upon theactuation of the pin 25 by the sector 26, and then the accumulatorwheels 14 will be moved into engagement with the segments 11 upon theforward movement of the crank segment 26, and consequently the releasedsegments will be in mesh with the accumulator wheels 14 on the forwardmovement and the position of such segments determined by theaccumulation on such wheels in the same manner as illustrated anddescribed in the co-pending application, above referred to. Upon thereturn movement of the sector 26, the accumulator wheels 14 will bewithdrawn. from free engagement with the segments 11, and consequentlythe accumulator wheels 14 be thereby cleared.

Leemans The mechanism forming the protecting means now to be describedconstitutes the main feature of the present invention. The

sector 26 is resiliently connected to the shaft V 27,there beinpositioned adjacent to the sector 26 and xed to the shaft 27, a bracket37, which'has a pin 38 on its rearward end, and a curved slot 39forwardly thereof. Through this slot 39 extends the stop pin 40 of thesector 26. Near the front edge of the sector 26 upwardly of the bracket37 is formed an anchor pin 41. Secured to the anchor pins 41 and 38 isthe spring 42 which is substantially resistant, by means of which spring42 the sector 26 is resiliently carried with the bracket 37 on thereturn movement of such bracket, the sector 26 being actuated forwardlyby the coperation of one end of the slot 39 with the pin 40.

For positively determining the forward and rearward limit of movement ofthe shaft 27, the stop bracket 43 is provided with a rearwardlyextending arm 44 and a forwardly extending arm 45, the rearwardl)vextending arm 44 being adapted to engage the stop post 46 secured to themain frame A, and the stop arm 45 bein adapted to engage the'stop, ost47 secure to the main frame A. The racket 43 is also fixed to the shaft27.

The operation of the protecting means is substantially as follows Shouldthe accumulator wheels 14 be moved to engage the teeth 12 of thesegments 11 and there be any displacement of the accumulator wheels 14,and the teeth 13 of the wheels 14 not properly mesh with the teeth 12 ofthe segments before their crests engage one another, with the ensuingreturn movement of the bracket 37, the sector 26 will be obstructed fromforward movement, and the spring 42 take up the strain of such faultyengagement as shown in Fig. 2. Obviously thc retractor will likewise beestopped from returning when the sector is so obstructed, andconsequently none of the type-carrying segments of the particular groupwill be returned, and therefore no accumulation take place on any of theaccumulator wheels until the faulty engagement has been corrected.Thereby not only will the machine parts be protected from injury, butalso the record preserved from an erroneous accumulation.

It is obvious that various changes and modifications may be made to thedetails of construction without departing from the general spirit orscope of the present invention.

vI claim:

1. The combination, with a printing mechanism having type carryingsegments and accumulator wheels for coperating with said segments, of anactuator shaft; a sector loosely mounted on the actuator shaft; abracket rigidly mounted on the actuator shaft and provided with ananchor pin; an anchor pin on the sector; a tension spring stretchedbetween said anchor pins; and means operated by the sector for movingthe accumulator wheels into and out of enga ement with'the segments.

2. he combination, with a printing mechanism having type carryingsegments and accumulator wheels for cooperating with said segments, ofan actuator shaft; a sector loosely mounted on the actuator shaft; abracket rigidly mounted on the actuator shaft and provided with ananchor pin and a curved slot; a stop' pin on said sector and projectingthrough said slot; an anchor pin on the sector; a tension springstretched between said anchor pins; and means operated by the sector tormoving the accumulator wheels into and out of engagement with thesegments.

3. The combination, with a printing mechanism having type carryingsegments and a retractor for releasing and retracting the segments, ofaccumulator wheels adapted to coperate with said segments; an actuatorshaft; a sector loosely mounted on said actuator shaft; a bracketrigidly mounted on the actuator shaft and provided with a curved slotand an anchor pin; a stop pin provided on said sector and projectingthrough said slot; an anchor pin on the sector; a tension springconnecting said anchor pins; and means adapted to be contacted by thesector for moving the accumulator wheels into and out of coperation withthe type carrying segments.

4. The combination, with a printing mechanism having type carryingsegments and a retractor for releasing and retracting the segments, ofaccumulator wheels adapted to coperate with said segments; an actuatorshaft; a sectorrloosely mounted on said shaft; a bracket'rigidly`mounted on the shaft and provided with a curved slot and an anchor pin;a stop pin provided on said sector and projecting through said slot; ananchor pin on said sector; a tension spring connecting said anchor pins;an additional bracket rigidly mounted on said shaft and provided withstop arms; adjustable stop posts adapted to be engaged by said armsrespectively to limit the movement of the shaft: and means adapted to becontacted by the sector for moving the accumulator wheels into and outof coperation with the type carrying segments.

5. The combination, with a. printing mechanism having type carryingsegments and aretractor for releasing and retracting the segments, ofaccumulator wheels adapted to coperate with said segments; an actuatorshaft; a sector loosely mounted on said actuator shaft; a Ibracketrigidly mounts ed on the actuator shaft and provided with a curved slotand an anchor pin; a stop pin provided on said sector and projectingthrough said slot; an anchor pin on said section; a tension springconnecting said anchor pins; a link having its ends pii'oted to theretractor and said sector respectively; and means adapted to becontacted by the sector for moving the accumulator wheels into and outof coperation with the type carrying segments.

6. The combination, with a printing mechanism having type carryingsegments and a retractor for releasing and retracting the segments, ofaccumulator wheels adapted to coperate with said segments; an actuatorshaft; a sector loosely mounted on said shaft;- a bracket rigidlymounted on the shaft and provided with a curved slot and an anchor pin;a stop pin provided on said sector and projecting through said slot; ananchor pin on the sector; a tension sprin connecting said anchor pins;an additiona bracket rigidly mounted on said shaft and provided withstop arms; adjustable stop posts adapted to be engaged by said armsrespectively to limit the movement of the shaft; a link having its endspivoted to the retractor and said sector respectively; and means adaptedto be contacted by the sector for moving the accumulator wheels into andout of coperation with the type carrying segments.

7. In combination with a' printing' mechanism having oscillatingtype-carrying segments, accumulator wheels, a main driving shaft, acrank sector mounted on said shaft, resilient means for connecting saidsector with said shaft, connecting means for connecting said sector withsaid wheels so that the actuation of said sector will actuate saidwheels, the resilientmeans taking up the strain in case of faultyengagement between said Wheels and said segments, a stop member tintedon said bracket, two stop arms extending from said stopl member. andstop posts to either side of said driving shafts, said posts and armsengaging one another `to determine the extreme positions of saidbracket.

lWiLLliAli/l W. LASKER. wWitnesses:

BnNanraiN B. Avana', Jarras Pownns.

